package com.example.config;

import cn.hutool.json.JSONUtil;
import com.alibaba.druid.support.json.JSONUtils;
import com.example.annotation.Log;
import com.example.model.SysLog;
import com.example.service.ISysLogService;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import java.time.LocalDateTime;
import java.util.Collection;
import java.util.Map;

//@Data
@Aspect
@Component
public class LogConfig {

    private static final Logger log = LoggerFactory.getLogger(LogConfig.class);

    /**
     * 引入日志Service，用于存储数据进数据库
     */
    @Autowired
    private ISysLogService sysLogService;

    /**
     * 配置切入点-xxx代表自定义注解的存放位置，如：com.xiarg.genius.annotation.annotation.Log
     */
    @Pointcut("@annotation(com.example.annotation.Log)")
    public void logPointCut() {
    }

    /**
     * 处理完请求后执行此处代码
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "@annotation(controllerLog)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Log controllerLog, Object jsonResult) {
        handleLog(joinPoint, controllerLog, null, jsonResult);
    }

    /**
     * 如果处理请求时出现异常，在抛出异常后执行此处代码
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "@annotation(controllerLog)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Log controllerLog, Exception e) {
        handleLog(joinPoint, controllerLog, e, null);
    }

    /**
     * 日志处理
     */
    protected void handleLog(final JoinPoint joinPoint, Log controllerLog, final Exception e, Object jsonResult) {
        try {
            MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
            // 获取当前的用户
            String userName = "genius";
            // *========数据库日志=========*//
            SysLog sysLog = new SysLog();
            sysLog.setStatus(1);
            // 请求的地址 ip和localtion是前端获取到传过来的
            ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            assert requestAttributes != null;
            HttpServletRequest request = requestAttributes.getRequest();
            Map<String, String[]> parameterMap = request.getParameterMap();
            String ip = getIpAddr(request);
            sysLog.setOperIp(ip);
            sysLog.setOperLocation(request.getHeader("location"));
            sysLog.setOperParam(JSONUtil.toJsonStr(parameterMap));
            sysLog.setOperUrl(request.getRequestURI());
            sysLog.setOperName(userName);

            if (e != null) {
                sysLog.setStatus(0);
                int length = e.getMessage().length();
                sysLog.setErrorMsg(e.getMessage().substring(0, length > 2000 ? 2000 : length));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            sysLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            sysLog.setRequestMethod(request.getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, sysLog, jsonResult, request);
            // 保存数据库
            sysLog.setOperTime(LocalDateTime.now());
            // 返回数据
            sysLog.setJsonResult(jsonResult == null ? "" : jsonResult.toString());
            // 将处理好的日至对象存储进数据库
            sysLogService.save(sysLog);
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取操作ip地址
     *
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        if (request == null) {
            return "unknown";
        }
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Forwarded-For");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Real-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

    /**
     * 获取注解信息
     *
     * @param joinPoint
     * @param log
     * @param sysLog
     * @param jsonResult
     * @param request
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, SysLog sysLog, Object jsonResult, HttpServletRequest request) throws Exception {
        // 设置action动作
        sysLog.setBusinessType(log.businessType().ordinal());
        sysLog.setTitle(log.title());
    }

    private void setRequestValue(JoinPoint joinPoint, SysLog sysLog, HttpServletRequest request) throws Exception {
        String requestMethod = sysLog.getRequestMethod();
        if (RequestMethod.PUT.name().equals(requestMethod) || RequestMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            sysLog.setOperParam(params.substring(0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            sysLog.setOperParam(paramsMap.toString().substring(0, 2000));
        }
    }

    /**
     * 解析方法参数信息
     *
     * @param paramsArray
     * @return
     */
    private String argsArrayToString(Object[] paramsArray) {
        StringBuilder params = new StringBuilder();
        if (paramsArray != null && paramsArray.length > 0) {
            for (Object o : paramsArray) {
                if (o != null && !isFilterObject(o)) {
                    try {
                        Object jsonObj = JSONUtils.toJSONString(o);
                        params.append(jsonObj.toString()).append(" ");
                    } catch (Exception e) {
                        log.error(e.getMessage());
                    }
                }
            }
        }
        return params.toString().trim();
    }

    @SuppressWarnings("rawtypes")
    public boolean isFilterObject(final Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Object value : collection) {
                return value instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Object value : map.entrySet()) {
                Map.Entry entry = (Map.Entry) value;
                return entry.getValue() instanceof MultipartFile;
            }
        }
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }
}